<s>
Multithreaded	B-Operating_System
,	O
Parallel	B-Application
,	O
and	O
Distributed	O
Programming	O
(	O
MPD	B-Language
)	O
is	O
a	O
concurrent	B-Operating_System
programming	I-Operating_System
language	O
whose	O
syntax	O
is	O
derived	O
from	O
the	O
one	O
used	O
in	O
the	O
book	O
Foundations	O
of	O
Multithreaded	B-Operating_System
,	O
Parallel	B-Application
,	O
and	O
Distributed	O
Programming	O
.	O
</s>
<s>
The	O
name	O
lists	O
the	O
distinguishing	O
features	O
of	O
the	O
language	O
,	O
namely	O
that	O
it	O
supports	O
all	O
three	O
of	O
these	O
concurrent	B-Operating_System
programming	I-Operating_System
techniques	O
.	O
</s>
<s>
MPD	B-Language
is	O
implemented	O
as	O
a	O
variant	O
of	O
the	O
SR	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
It	O
has	O
a	O
different	O
parser	B-Language
,	O
but	O
it	O
uses	O
the	O
same	O
intermediate	O
form	O
and	O
run-time	O
system	O
as	O
SR	B-Language
.	O
Consequently	O
,	O
MPD	B-Language
provides	O
the	O
same	O
variety	O
of	O
concurrent	B-Operating_System
programming	I-Operating_System
mechanisms	O
as	O
does	O
SR	B-Language
.	O
</s>
<s>
MPD	B-Language
programs	O
can	O
execute	O
on	O
single	O
processors	O
,	O
shared-memory	B-Operating_System
multiprocessors	I-Operating_System
,	O
or	O
clusters	O
of	O
(	O
homogeneous	O
)	O
processors	O
.	O
</s>
<s>
The	O
implementation	O
transparently	O
supports	O
a	O
variety	O
of	O
different	O
kinds	O
of	O
processors	O
and	O
Unix	B-Application
systems	I-Application
.	O
</s>
